baymule
Sustainability Master
She can take the AC's (I guess you are referring to window units) and wash them down with the water hose. Tell her to buy some coil cleaner at Lowes (spray can) and soak down the coils, then rinse with water hose. They will clean up and she can put them back.

. Zone 10, she could grow anything, and most of it year round. Except ... she grew up in Michigan. There are certain things that absolutely have to have a frost. They don't care about paradise; they want a certain amount of cold. My mother longed for and coveted lilac. It was part of her childhood, and she needed that comfort, especially as she grew older. Didn't matter that rosemary and lavender and lemon trees grew year round; she wanted lilac. Tulips would have been nice too. She would douse the lilac bush with ice cubes to make it think that it was really winter. It never believed her